/Engine/Source/Runtime/Engine/Classes/PhysicsEngine/PhysicsConstraintComponent.h
Directly specify component to connect. Will update frames based on current position.
void SetConstrainedComponents ( [UPrimitiveComponent](API\Runtime\Engine\Components\UPrimitiveComponent) * Component1, [FName](API\Runtime\Core\UObject\FName) BoneName1, [UPrimitiveComponent](API\Runtime\Engine\Components\UPrimitiveComponent) * Component2, [FName](API\Runtime\Core\UObject\FName) BoneName2 )